The problem of the circular polarization of emission from interstellar OH molecules

Details The problem of the circular polarization of emission from interstellar OH molecules The problem of the circular polarization of emission from interstellar OH molecules

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58..550k&link_type=abstract

Astronomicheskii Zhurnal, vol. 58, May-June 1981, p. 550-553. In Russian.

Astronomy and Astrophysics

Astronomy

Circular Polarization, Hydroxyl Emission, Interstellar Gas, Interstellar Masers, Molecular Clouds, Polarized Radiation, Boltzmann Distribution, Gas Temperature, Interstellar Magnetic Fields, Line Spectra, Molecular Spectra, Zeeman Effect

Scientific paper

The degree of circular polarization for all four maser lines of the ground state of interstellar OH molecules is calculated on the basis of the Boltzmann distribution of populations of Zeeman sublevels. It is shown that considerable circular polarization should be observed in the main lines, and that the degree of circular polarization should be low in the satellite lines. Ranges of magnetic field strength, OH concentration, and cloud kinetic temperature are determined for which the circular polarization of OH emission is possible.

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